GeForce GTX 285 1GB vs Radeon HD 7950

Intro

Compare all that to the Radeon HD 7950, which features a core clock speed of 800 MHz and a GDDR5 memory speed of 1250 MHz. It also makes use of a 384-bit bus, and makes use of a 28 nm design. It is made up of 1792 SPUs, 112 TAUs, and 32 ROPs.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 7950		200 Watts
GeForce GTX 285 1GB		204 Watts
	Difference: 4 Watts (2%)

Memory Bandwidth

Theoretically speaking, the Radeon HD 7950 should perform quite a bit faster than the GeForce GTX 285 1GB overall. (explain)

Radeon HD 7950		240000 MB/sec
GeForce GTX 285 1GB		158976 MB/sec
	Difference: 81024 (51%)

Texel Rate

The Radeon HD 7950 should be a lot (more or less 73%) faster with regards to anisotropic filtering than the GeForce GTX 285 1GB. (explain)

Radeon HD 7950		89600 Mtexels/sec
GeForce GTX 285 1GB		51840 Mtexels/sec
	Difference: 37760 (73%)

Pixel Rate

If using a high resolution is important to you, then the Radeon HD 7950 is the winner, by far. (explain)

Radeon HD 7950		25600 Mpixels/sec
GeForce GTX 285 1GB		20736 Mpixels/sec
	Difference: 4864 (23%)

Please note that the above 'benchmarks' are all just theoretical - the results were calculated based on the card's specifications, and real-world performance may (and probably will) vary at least a bit.

Price Comparison

Specifications

Memory Bandwidth: Memory bandwidth is the max amount of data (in units of MB per second) that can be transferred over the external memory interface within a second. The number is worked out by multiplying the bus width by the speed of its memory. In the case of DDR memory, the result should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The better the memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that are processed in one second. This is calculated by multiplying the total amount of texture units of the card by the core clock speed of the chip. The better this number, the better the video card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels in a second.

Pixel Rate: Pixel rate is the most pixels the video card could possibly record to the local memory in one second - measured in millions of pixels per second. The figure is worked out by multiplying the number of Raster Operations Pipelines by the the card's clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel fill rate also depends on quite a few other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the potential to reach the max fill rate.